Earth-anchor.



JASPER BLACKBURN, OF KIRKWOOD, MISSOURI.

EARTH-ANCHOR.

To all whom-it may concern:

- Be it known that I, JASPER BLAGKBURN, a citizen of the United States, and resident of Kirkwood, St, Louis county, .Missou'ri, have invented certain new and useful Improvements in Earth-Anchors, of which. the

' following is'a specification containing a .full, clear, and exact description, reference being had tothe accom 10 forming a part hereof i a Myv 'nventionfr'lites to improvements earth anchorsfandgtheobject of my invention is to providean improved construction of the inverted cone type of anchor, especial attention being directed toward the con-' panying drawings,

struction of the base or bottom of the anchor vention consists in certain novel features of upwardly projecting concentric rings of varying heights, whose tops form an inolined, broken or interrupted surface over which broken stone is tamped to iproject into the earth surrounding the bore in which the anchor is inserted inorder. to obtain a maximum of holding efiiciency. A

lVith theabovelpurposesin View my in construction and arrangement of parts as will be hereinafter described, pointedgout in the claims and illustrated by the mom-.6 P y drawings, in which i l .Figure l is a plan of one of 'my in provedanc-hors; Fig. 2 is, a transverse sec tional elevation taken on the line 22 .of Fig. 1; and Fig. 3 is a view on a reduced scale,showing my improved anchor as in use.

Referring by numerals to the accompanying drawings: 5 designates the base or body portion of the anchor which isprefe'rably disk-shape. Formed on the upper surface of the body 5 and preferably castintegral therewith is a sleeve 6. 'Form'ed integral with the base is a plurality of concentric ribs 7 which graduate in height, the rib next adjacent the sleeve being the highest. Formed in the upper surface of the disk 9 designates an ordinary anchor rod, the

lowermost end of whichis threaded and ar- I ranged to be insertedthrough the sleeve 6.

Specification of Letters Patent.

Patented lFeb. M), 1914.

Application filed March 11, 1913. Serial No; 753,610,

In; this'flanchor is' plated in a bore in theearth usually formed at an in-Y cline as shown, the anchor rodhavin been previously secured to the anchor. T e anchorrests inthe bottom'of. the bore, and by reason of;theiiflatibottomed base or -body portion there isno water space for water to collect and-stand'in,1which'fis objectionable for wellknown reasons. After the anchor has beenv positioned as just'described broken stone or the like'is placed upon the anchor and tamped, theiterrace d conical top oft-he anchor serying to deflect the stone out ardlyto 'en bed' in the walls of the bore, part jQf the stone be'ing pressed into the channe formed :iby ribs so that the anchor, bei

held to the mass of stone-jby reason of sairlfio ribsand the massfofstone being embedded in the wallslgof the bore, will projvidega maximum, of holding eiliciencyiry *laiid a' plurality of concentric ribs which vary in height, the innermost rib being 35 higher than the outermost rib.

2. As a new article of manufacture, an earth anchor, comprising a fiat substantially d1sk-shape base,,' a-sleeve providin means for attachingthe'anchor to an anc ior rod, 90

and a plurality of concentric ribs which vary. in height, the innermost "ribfbeing higher thanjthe outermost rib, and there being a channel formed in thetop of the a base between theoutei'n'iost rib and the mar- 95 gin of the base. 1 t,

In testimony whereofll have signed my name to this specification, in presence of two subscribing Witnesses.

JASPER BLAC URN.

Witnesses: I I v E. L. WALLACE, N. G. Burma.

Itis to; be understood that,;.a ter the an- 7 chor-has been set in positioii' and broken stone or the like tamped, thereupon. as described, the entire openingor bore is filled in an ordinary" manne r.

article of manufacture',- an 

